It is called Dulce de leche, or Mexican Milk Fudge, but to us, it looked like dark brown sugar cubes when we were little. We would literally move the chips and fight over the candy. The waitress would usually see this, and bring everyone over a piece, and then put extra under the next chip refill. This is also the restaurant that introduced us to Tex Mex style food, it was not that common back then. Sadly, they went out of business sometime in the late 80’s if memory servers. Panchos came in and that was our next once a month Friday night dinner for the next 15 years.

